Subtract 30/20 from 84/42
1st number: 2 0/42, 2nd number: 1 10/20
84/42 - 30/20 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
84/42 = 84 × 10/42 × 10 = 840/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
30/20 = 30 × 21/20 × 21 = 630/420 - Subtract the two like fractions:
840/420 - 630/420 = 840 - 630/420 = 210/420 - After reducing the fraction, the answer is 1/2
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